#include<iostream>
#include<queue>

using namespace std;

int Add(int num1,int num2)
{
    int sum=num1+num2;
    return sum;
}

int main()
{
    int num1=7;
    int num2=11;
    int sum=Add(num1,num2);
    cout<<"sum "<<sum<<endl;
    queue<int> q;
    cout<<q.size()<<endl;
    q.push(1);
    cout<<q.size()<<endl;
    q.pop();
    cout<<q.size()<<endl;
    return 0;
}